How to find the right Electrical Hubs AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Electrical Hubs
- Panel hub vs conduit hub
- Outdoor load centers and meter sockets take a bolt-on hub made for their top opening. For a standard knockout, use a threaded conduit hub (often called a Myers-style hub). A bolt-on hub only seals and stays listed on the enclosure it was made for.
- Trade size
- The hub's thread must match the conduit trade size, and its body must fit the knockout or hub-plate opening. Adapters stacked to cover a mismatch break the raintight seal.
- Raintight rating
- For entries on top or sides of outdoor enclosures, use a hub marked raintight, with its gasket installed. Water entering from above is the main path for moisture into outdoor panels.
- Insulated throat and grounding
- Choose an insulated throat for larger conductors. Use a bonding-type hub where the conduit must be bonded across a concentric or eccentric knockout. The insulated throat protects conductor insulation, and the bonding hub keeps ground continuity across punched-out rings.
- Material
- Zinc die-cast suits general use. Choose aluminum or stainless steel in corrosive or coastal locations. Corrosion seizes the hub and degrades the seal.
Brands that matter
- Bridgeport Fittings: Wide range of raintight conduit hubs and fittings.
- Arlington Industries: Common raintight hubs and electrical fittings.
- Topaz: Contractor-grade conduit hubs and fittings.
- Halex: Widely available conduit fittings and hubs.
- Square D (Schneider Electric): Bolt-on hubs for its own outdoor enclosures.
- Eaton: Bolt-on hubs for its outdoor load centers and sockets.
What to avoid
- Hubs not marked raintight on outdoor top entries.
- Bolt-on hubs from a different brand than the enclosure.
- Hubs installed without their sealing gasket.
Questions
What is a Myers hub?
It is the common trade name for a threaded, gasketed conduit hub that seals a conduit into an enclosure knockout. Several fitting makers produce this style.